Error: ember.debug.js:16316 Uncaught Error: Assertion Failed: Ember.Object.create no longer supports defining methods that call _super

Ember CLI
1

Dear Members,

I am getting this error:

ember.debug.js:16316 Uncaught Error: Assertion Failed: Ember.Object.create no longer supports defining methods that call _super.

This is when I have two models (classes) in models folder say: A and B and both classes are created using Ember-cli

A has properties called a1, a2, a3 and a4

and B has property called b1 and I am trying to set b1 in B using setB methods which is as following:

import A from '../models/A';
setB: function()
{
  if(Ember.isEmpty(this.b1))
 {
    this.set('b1', A.create({a1: something1, a2: something2, a3: something3, a4: something4}));

    //This line generates above error
 }

}

We use this types of declarations throughout the app.

In this, please tell a solution.

Regards

#Dn